INVESTIGATORS ARE LOOKING FOR TWO MEN AND SAY THEY KNOW WHO ONE OF THEM IS. PRESIDENT OBAMA IS IN MILWAUKEE TODAY. THIS IS NOT A CAMPAIGN RELATED TRIP. THE POLITICAL TONE IS STARTING TO HEAT UP. GOVERNOR SCOTT WALKER WILL ALSO BE THERE TO GREET MR. OBAMA. MARY BURKE SAYS SHE WILL MEET RIVALING THE PRESIDENT SINCE THIS IS NOT A CAMPAIGN STOP. THE PRESIDENT WILL BE AT LABOR FEST. BEN HUTCHISON IS THERE. THIS EVENT DID THAT HAPPEN YES -- LAST YEAR. IT WAS CANCELED LAST YEAR BECAUSE OF STAFFING CHANGES. IT WILL RETURN HERE. PRESIDENT OBAMA WILL BE SPEAKING ON THE GROUNDS THIS AFTERNOON. THIS IS VIDEO OF HIS VISIT IN 2010 FOR LABOR FEST. SHEILA COCHRAN SAYS THE PRESIDENT WILL ENERGIZE UNION MEMBERS. TICKETS ARE REQUIRED. UNION MEMBERS CAN GET THEM FROM THE UNION. THERE WILL BE STANDING ROOM ONLY AREAS FOR THE PUBLIC. THIS HAPPENS AT THE AFTERNOON.